A porous alumina ceramic of 99.7% Al2O3 content, used extensively for long-life laser reflectors. This material is sintered at high temperatures to achieve a controlled porosity.
Surfaces can be sealed and coated with a solarization-resistant glaze to give high bulk refectivity
97.8% reflectance efficiency at 1000nm
Reflectance efficiency exceeds 96% across the wavelength range 500-2000nm (see curve)
Good thermal conductivity
High electrical resistivity
Pumping chambers for ND: YAG lasers _ low to high power, single or multiple lamp designs. Pumping chamber reflectors of this material are virtually indestructible, and prove a highly cost effective alternative to metal coated types.